CMS Experiment at CERN

06/10/2026

Incredible views underground, as teams are carrying out the complex work needed to prepare the CMS detector at CERN for the High-Luminosity era.

📷 Andres Delannoy

02/10/2026

The LHC produces an incredible amount of data and physicists have hundreds of theories about what new physics might look like.

The challenge? We only have moments to decide which collisions are worth keeping. If an unexpected signal doesn’t fit what we’re looking for, the potentially groundbreaking data could be discarded before we ever get to study them.

With more ideas than researchers and far more data than we can store, the big question is: how do we make sure we don’t throw away the discovery we’re not yet looking for?

👉 Read the full blog here: https://cylindricalonion.web.cern.ch/blogs/protected-nobody-knows-what-new-physics-will-look

30/09/2026

🌍 The CMS Experiment at CERN has more than 6,000 members, with institutions across 50+ countries, studying particle physics, a truly global effort.

👀 Take a look inside some of the CMS laboratories around the world!

👉 To read the full article, click the link in bio.

24/09/2026

Could the invisible leave footprints in our detectors? 👣

CMS performs the first collider search for "inelastic dark matter" in the case where dark-matter particles travel a measurable distance before decaying into a pair of low-momentum electrons.

Read more: https://cms.cern/news/chasing-dark-matter-mysterious-electron-pairs

24/09/2026

22/09/2026

Tae-Jeong Kim has joined Florencia Canelli as Deputy Spokesperson, working with Anadi Canepa as Spokesperson for the CMS Collaboration for 2026-2028.

Now with over 6000 people, CMS remains one of the world’s largest scientific collaborations 🌐

The collaboration welcomes Tae-Jeong Kim in his new position, and thanks outgoing Deputy Spokesperson, Hafeez Hoorani, for representing CMS from 2024-2026.

🗞️ Learn more about the new CMS Management: https://cms.cern/index.php/news/cms-welcomes-new-deputy-spokesperson-2026-2028

18/09/2026

When rare decays enter the precision era...
The CMS collaboration CERN keeps seeing the same intriguing pattern in decays of bottom quarks to strange quarks and two muons: systematically lower rates than predicted by the Standard Model!
👉Read the full briefing on the CMS website: https://cms.cern/news/when-rare-decays-enter-precision-era

18/09/2026

🧩 Big science, small scale!

We built a miniature version of the CMS detector at CERN, piece by piece, from multiple 3D-printed parts. Watch the timelapse of the assembly process, from individual printed components to the completed detector.

📝 Read the story behind the design and how the detector was made 3D-printable on our blog in bio.